Periodic inventory System and Inventory Costing Methods E7. Gary's Parts Shop recorded the following purchases and sales during the past year: Jan. 1 Beginning inventory 125 cases @ $46 Jan. lB eginning inventory125 cases @$46 Feb. 25 Purchase June 15 Purchase Oct. 15 Purchase Dec. 15 Purchase Goods available for sale Total sales Dec. 31 Ending inventory 100 cases $52 200 cases @ $56 150 cases @ $56 100 cases $60 675 cases 500 cases 175 cases 5,750 5,200 11,200 8,400 6,000 $36,550